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Calendars are a vital tool in human civilization. 📅 That's how we know when to start planting crops and when to celebrate birthdays – and eat cake without remorse! 🎂 Today, we use the Gregorian calendar, but what are the time management systems created by the ancient civilizations, based on their needs and cultural beliefs? Watch this video and learn everything about 5 old calendars that followed the cycles of the moon or the movements of the sun: the Mayan one, the one Egyptians used 🇪🇬, the Aztec calendar, the Chinese 🇨🇳, and the Hindu one. 🇮🇳

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